Scientists find dinosaur ancestors ‘may have been tiny’

Dinosaurs are usually thought of as these giant creatures, but the results of new research released this week outline a different view and find that they might have actually started out small.

This evidence comes from newly described fossils found on Madagascar island, off the east coast of Africa, which indicates the creatures lived about 237 million years ago and stood just 10cm tall.

Scientists say the specimen may also help clarify the origins of pterosaurs, which were winged dinosaurs that ruled the skies during the time of dinosaurs.

Co-author of the research study, Christian Kammerer, from the North Carolina Museum of Natural Sciences told Science Daily this week that “there’s a general perception of dinosaurs as being giants.”

“But this new animal is very close to the divergence of dinosaurs and pterosaurs, and it’s shockingly small,” she said.

The specimen, named Kongonaphon kely, or “tiny bug slayer”, was found in 1998 in Madagascar by a team of paleontologists, led by John Flynn from the American Museum of Natural History in New York.

Dinosaurs and pterosaurs both belong to the group Ornithodira. Their origins, however, are poorly known, as few specimens from near the root of this lineage have been found.

The description and analysis of this fossil and its relatives, published on Tuesday in the journal Proceedings of the National Academy of Sciences, may help explain the origins of flight in pterosaurs, the presence of “fuzz” on the skin of both pterosaurs and dinosaurs, and other questions about these charismatic animals.

“This fossil site in southwestern Madagascar from a poorly known time interval globally has produced some amazing fossils, and this tiny specimen was jumbled in among the hundreds we’ve collected from the site over the years,” Flynn said.

“It took some time before we could focus on these bones, but once we did, it was clear we had something unique and worth a closer look. This is a great case for why field discoveries — combined with modern technology to analyze the fossils recovered — is still so important.”

“Discovery of this tiny relative of dinosaurs and pterosaurs emphasizes the importance of Madagascar’s fossil record for improving knowledge of vertebrate history during times that are poorly known in other places,” project co-leader Lovasoa Ranivoharimanana, professor and director of the vertebrate paleontology laboratory at the University of Antananarivo in Madagascar told Science Daily.

“Over two decades, our collaborative Madagascar-US teams have trained many Malagasy students in paleontological sciences, and discoveries like this helps people in Madagascar and around the world better appreciate the exceptional record of ancient life preserved in the rocks of our country.”